Gd_3Ga_5O_(12):Ag薄膜电致发光材料的制备及其发光性质

PREPARATION AND LUMINESCENT CHARACTERISTICS OF AN OXIDE PHOSPHOR Gd_3Ga_5O_(12):Ag

研究了Gd3 Ga5O12 :Ag材料的制备及其发光性质 .Gd3 Ga5O12 :Ag材料通过固相反应法制得 ,采用X射线衍射法分析了材料的结晶度及成分 .用电子束蒸发将该材料制备成交流的薄膜电致发光器件 ,得到了较好的蓝紫色发光 ,发光峰分别位于 397和 46 7nm .通过对材料的光致发光和激发光谱的研究和比较 ,得出 397和 46 7nm分别来自于氧空位和Ag+ 的发光 .

A composite oxide material Gd 3 Ga 5 O 12 :Ag was prepared by solid state reaction. The composition and the crystallinity of phosphor were determined by X\|ray diffraction. The thin film electroluminescence (EL) devices based on Gd 3 Ga 5 O 12 :Ag were prepared by electron beam evaporation. We have obtained a good UV\|blue EL emission with a peak at 397?nm and a shoulder at 467?nm. The EL peaks located at 397 and 467?nm are found to originate from the oxide vacancies and 4d\+95s\+0 to 4d 10 of Ag\++, respectively.